Send a message to the person who requested a photo of the grave monument of Priscilla Magnus with the following comment:
I am trying to figure out who his father is as well as the birth year. There may be an error in the pedigree resource of FamilySearch where they have this Barnett Magnus as the son of Simon and not Raphael. The Barnett who is the son of Simon was born in 1844, and the other Barnett in 1842.